Defensive publication

ABSTRACT

A REINFORCED MASTIC FOR SEALING CRACKS IN INSULATION, ESPECTIALLY IN INSULATION FOR HEATED PIPING. THE MASTIC COMPRISES WATER, A QUICK-DRYING INSULATING CEMENT, AND REINFORCING FIBERS OF POLY (M-PHENYLENE ISOPHTHALAMIDE). THE MASTIC HAS EXCELLENT RESISTANCE TO THERMAL DEGRADATION FROM HIGH TEMPERATURES AND INCURS LITTLE CRACKING. THE FIBERS ARE PREFERABLY SHORT-LENGTH CUT FIBERS, WHILE THE CEMENT IS USUALLY AN INORGANIC SILICA-CONTAINING MATETIAL. THE CEMENT AND THE FIBERS ARE DRY-MIXED (UP TO ABOUT 2% FIBERS CAN BE USED BASED ON WEIGHT OF CEMENT9 AND THEN WATER ADDED. THE RESULTING MASTIC CAN THEN BE APPLIED IN THE SAME MANNER AS NONREINFOECED INSULATING &#34;MUD.&#34;

DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16, 1969. 869 0.G. 687. The abstracts 0t Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a. sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofiice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED SEPTEMBER 3, 1974 926 O.G. 1O

T926,004 MASTIC 0F INORGANIC INSULATING CEMENT POLY(m PHENYLENEISOPHTHALAMIDE) FIBERS, AND WATER Thomas Edward Pavey, 3619 Harris Ave.,Richmond, Va. 23223 Filed Aug. 14, 1973, Ser. No. 388,136 Int. Cl. C08g51/04, 51/24 US. Cl. 26029.2N No Drawing. 6 Pages Specification Areinforced mastic for sealing cracks in insulation, especially ininsulation for heated piping. The mastic comprises water, a quick-dryinginsulating cement, and reinforcing fibers of poly (m-phenyleneisophthalamide). The mastic has excellent resistance to thermaldegradation from high temperatures and incurs little cracking. Thefibers are preferably short-length cut fibers, while the cement isusually an inorganic silicate-containing material. The cement and thefibers are dry-mixed (up to about 2% fibers can be used based on weightof cement) and then water added. The resulting mastic can then beapplied in the same manner as nonreinforced insulating lSmud.!

